Improvement in machines for sawing circular slabs



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MACHINE FOR SAWING CIRCULAR SLABS. No.184-,511. Pate'nnedITov.Z1,1876.

WITNESSES: INVENTOB ATTORNEYS;

UNITED STATES PATENT QFFIGE.

JOHN J. DIMON-D, OF EW YORK, N. Y.

IMPROVEMENTIN MACHINES FOR SAWING CIRCULAR SLABS.

Specification forming part of Letters Patent No. 184,511, dated November 21, 1876; application filed October 14, 1876.

Similar letters of reference indicate corre-' sponding parts.

I The object of my invention is to provide an improved machine for the purpose of sawing circular slabs of marble, stone, wood, and other material at a considerable saving of time, labor, and material; and the invention consists of stationary shafts, on which a sawframe with sleeve-shaped ends is reciprocated by suitable power, the connecting-rod being secured to one of the sleeve ends by a collar or band placed intermediately between-fixed collars.

In the drawing, A represents fixed supportin g-standards, to which the stationary shafts or pivots B, on which the saw-frame O swings, are firmly secured. The saw-frame O is loosely applied, by sleeve-shaped ends, to the stationary shafts B, for the purpose of swinging around the same as center pivots, being reciprocated simultaneously thereon by means of a connecting-rod, D, operated by suitable power.

The parallel arms 0 of the saw-frame G are connected at the ends by a stiffeningbrace, 0 attached rigidly by binding screwnuts a.

The arms 0 carry one or more saw-blades, E, which are adjusted to the width of the slabs to be cut on the threaded arms 0 and secured thereto by screw-nuts b at both sides.

Pieces or slabs of any radius and thickness around the same, and is rigidly held in position by fixed collars d at both sides, which are secured to the sleeve by clamp-screws d.

The saw-frame is fed to the work by a weight, pulley, and cord, spring, or other device, and is working, after having passed downward beyond the vertical line, by its own weight.

When circular slabs are required, the saws are first applied to one side of the block for cutting down a semicircle, being then applied to the other side to cut down the other semicircle until the cuts meet. The forward feed-motion of the saw-frame in a circle to the shafts, in connection with the reciprocating motion, produces the rapid cutting out of the slabs of any size and thickness.

Having thus described myinvention, I claim as new and desire to secure by Letters Patent The combination, with intermediately-spaced standards AA, of the saw-frame O (J 0 connected therewith by pivots B, as shown and described, so that circular slabs may be sawed from the solid block.

JOHN J. DIMOND. Witnesses:

PAUL GoEPEL, G. SEDGWIGK. 

